Reversing gearing



Aug. 10 1926.

C. HAYES REVERS IN'G GEAR ING Filed Dec. 10. 1925 Patented Aug. 10,1926.

UNITED STATES 1,595,933 PATENT OFFICE.

GHARLES HAYES, OF PARIS, FRANCE, ASSIGNOR TO COAL CARBONIZATION'COMPANY, A CORPORATION OF DELAWARE.

IBEVERSING GEABING.

Application filed December 10, 1925. Serial- No. 74,540.

. My invention relates to reversing gearing of the type in which acontinuously rotary driving member causes a driven member to rotate inone direction through a predetermined are then in the opposite directionthrough a greater are in the opposite direction so as to produce in thedriven member oscillating and rotating movement. My invention has forits object to provide a construction and arrangement of gearing of thetype stated which willbe adapted to effect oscillating and rotatingmovement ofa relatively large and heavy bod N iimerous forms ofmechanism for effecting this oscillating and rotating movement in valvegrinding devices are known but in valve grinding the valve to be groundto its seat is usually of relatively small diameter and weight and doesnot acquire sufficient momentum in its movement in one direction tocreate any material obstacle to reversal of its movement. Therefore asthere is no great resistance to be overcome the gearing of these valvegrinders need not be, and are not, adapted for heavy duty. In order tooscillate and rotate a relatively heavy body of relatively greatdiameter the gearing must be adapted to overcome the momentum of theoperated body so as to first check and then reverse without shock andwithout breakage of the operating parts.

With the object above indicated in View my invention consists in theconstruction and combination of elements hereinafter described andclaimed.

Referring to the drawings Figure 1 is a side view of my improved gearingand Figure 2 is a diagrammatic view showing the position of theoperating elements of the driving gear.

In the drawing 1 indicates a drive shaft carryin a cylinder 2 which withthe operating elements carried by itconstitute the driving member of thegear. These. operating elements consist of rollers 3, 4, 5, 6, 7 8 and9, preferably conical with their bases adjacent to the peripheralsurface of the cylinder, each carried on a stub shaft extending radiallyfrom the periphery of the cylinder 2,, these stub shafts being markedrespectively 3 4 5 6 7 9. The rollers 3 and 4 are arranged to the leftof the median line of the cylinder 8 and 2 and therollers 7 and 8 arearranged to the right of the median line, the rollers 5, 6 and 9 beingarranged on or approximately on the median line.

The rollers 3 and 4 are so one overlaps the other, the roller 3 beingcut away as shown at 3 to form a recess into which the periphery ofroller 4 fits, the roller 3, of course; being non-rotatable. Similarlythe roller 7 is cut away asshown at 7 2 to form a recess into which theperiphery of roller 8 fits. By reason of the arrangement there is nopassage between rollers 3 and 4 or between rollers 7 and 8, for theteeth of the driven gear 10.

Driven gear 10 is carried by a shaft 11 and consists of a disc ofsubstantial thickness having radially extending stub shafts 12 on eachof which is mounted to rotate freely a roller 13, the stub shafts, andthe rollers carried by them being equally spaced apart about theperiphery of the disc at sucli istance between adajcent "rollers as topermit a roller 5, 6, or 9 of the driving gear to pass between them whenthe driving and arranged that driven gears are arranged with their axlesat right angles as shown in Figure 1. The

cated by broken lines in Figure 2 rotation of the driving gear in thedirection indicated by the arrow the roller 5 will act upon the roller13 of the driven gear to force it to the right bringing roller 13 intoposition to be engaged by roller 4 to cause it to move to the right.This brings the next roller to 13 against the fixed roller 3 by which itis stopped from further movement to the right and as the driving gearcontinues its rotation the roller 3 causes this roller next'to roller 13to move to the left. Further rotation of the driving gear brings roller9- into engagement with roller 13 and as the rotation continues roller 9comes into contact with roller 13*. Further rotation of the driving gearbrings roller 13 against roller 7 which stops its movement to the leftand causes ,it to move to the right. Further rotation of the drivinggear causes roller 6 to engage roller 13 and move it to the right andthe further rotation brings roller into engagement with roller 13".

As there are two isolated rollers 5 and 6, between the reversing rollers3-4, and 7-8,

. and only one isolated roller, 9, between the reversing rollers 7-8 and34, it will be seen that the driven gear will be rotated further to theleft than it is rotated to the right. Thus the driven gear will be notonly oscillated first in one direction and then in the other, but willbe gradually rotated through a complete rotation.

The rollers 3, 4, 5, 6, 7 8 and 9 of the driving gear and the rollers 13of the driven gear are tapered from their bases outward at substantiallythe same angle so that the rollers on the driven gear bear a ainst theroller of the driving gear with w ich they make contact, throughout thefull length of a line journey its outer end and base. As the rollers ofthe two gears are, except rollers 3 and 7 free to rotate their contactis a rolling contact thus lessening friction and tending to smoothnessof operation.

The shaft of the driven gear may be provided with a suitable sprocket orother gear for communicating the oscillating and rotary movement to theobject to be moved. The particular object which the gearing hereindescribed is intended to operate is a retort or digester for distillingor carbonizing coal but it may be used for rotating retorts or kilns forother purposes or for imparting the oscillating and reciprocatingmovement to any desired object. 1

Having thus described my invention what I claim is 1. The combination ofa driving gear and a driven gear arranged with their axes at rightangles and each having engaging means extending radially from itsperiphery,

the engaging means ofthe driven gear being spaced at equal distancesapart and the engaging means of the driving gear comprising means foracting upon the engaging means of the driven gear to rotate it in onedirection through a predetermined arc, means for reversing the directionof its rotation, means for rotating it in the reverse direction througha predetermined arc and means for again reversing the direction of itsrotation the reversing means consisting of two rollers so mounted thattheir peripheries overlap, located out of line with the other engagingmeans of the driving ear.

g 2. The combination of a driving gear and a driven gear arranged withtheir axes at right angles and each having engaging means extendingradially from its periphery, the engaging-means of the driven gear beingspaced at equal distances apart and the engaging means of the drivinggear comother engaging means of the driving gear.

3. The combination of a driving gear and a driven gear arranged withtheir axes at right angles and each having engaging means extendingradially from its periphery, the engaging means of the driven gearconsisting of rollers carried on radial stub shafts spaced at equaldistances apart and the engaging means of the driving gear comprisingmeans for acting upon the engaging means of the driven gear to rotate itin one direct-ion through a predetermined are, means for reversing thedirection of its rotation, means for rotating it in the reversedirection through a predetermined arc and means for again reversing thedirection of its rotation, the engaging means of the driving gearconsisting of rollers carried on radial stub shafts, the reversing meansconsisting of two rollers so mounted that their peripheries overlap,located out. of line with the other engaging means of the driving gear.

4. The combination of a driving gear and a driven gear arranged withtheir axes at right angles and each having engaging means extendingradially from its periphery, the engaging means of the driven gearconsisting of frustro conical rollers carried on radial stub shaftsspaced at equal distances apart and the engaging means of the drivinggear comprising means for acting upon the engaging means of the drivengear to rotate it in one direction through a predetermined arc, meansfor reversing the direction of its rotation, means for rotating it inthe reverse direction through a predeterminedarc and means for againreversing the direction of its rotation,

the engaging means of the driving gear con? sisting of frustro conlcalrollers, the reversing means conslstlng of two frustro oonicai rollersso mounted that their peripheries overlap, located out of line with theother en aging means of the driving gear.

testimony whereof, I hereunto afix my signature. CHARLES HAYES.

